Goodwill and Other Intangible Assets - Changes in the Carrying Amount of Goodwill (Details) - USD ($) $ in Millions	12 Months Ended
	Dec. 31, 2024	Dec. 31, 2023
Goodwill [Roll Forward]
Beginning balance	$ 7,611	$ 7,495
Acquisitions	189	44
Foreign currency translation	(109)	72
Ending balance	7,691	7,611
Investment Servicing
Goodwill [Roll Forward]
Beginning balance	7,346	7,232
Acquisitions	189	44
Foreign currency translation	(107)	70
Ending balance	7,428	7,346
Investment Management
Goodwill [Roll Forward]
Beginning balance	265	263
Acquisitions	0	0
Foreign currency translation	(2)	2
Ending balance	$ 263	$ 265